Well-drilling trip.



C. W. WOODLAND.

WELL DRILLING TRIP.

APPLlCATION ELLED MAY 16. 1911.

Patented J an. 15, 1918.

l NV E NTO Fl WITNESSES a 1 U understood fromthe specific'atiomdrawings,

UNITED sTATEs: PATENT OFFICE.

CLEVELAND W. WOODLAND, OF LIND, WASHINGTON.

WELL-DRILLING ran.

Specification of Letters Patent. P t t 15,19

Application flied lay 16, 1917. Serial No. 189,071.

To all whom it may concern:

Be it known that I, CLEVELAND WALTER WOODLAND, a-citizen of the United States, residing at Lind, in the count of Adams and State of Washington, have invented certain new and useful Improvements in Well-w Drillin'g 'lrips, of which the following is a specification.

iihis'invention relates to an improvement in well drilling trips, and more particularly to a device of this character intended for use to act directly upon the cable or line by Which the string of tools is suspended, to

alternately take the cable in and then slacken the same the mechanism bein so formed that the device may be' fitted to derive power from. a constantly revolving shaft.

An. object of my invention is to provide a mechanism of the character set forth which has parts thereof'so arranged that the-cable carrying the string of tools will be drawn in and then automatically released to leave the tools substantially free and unhampered b excessive weight, which will allow the dril to strike a harder. blow at the bottom of the hole without the necessity of excessive weightingof thetool as required in the use ofcam and treadle or walking beam types of drilling machines.

A. further object resides in constructing the parts in such a wa that a small part of the Weight. of the dri ling tool will return the releasedparts to the starting position Where. the cable is slackened and. from which position the parts will be again moved'to raw in thecable.

Yet another object is to provide means by which even the-most minute adjustment of the length of stroke of the drilling tool can be obtained, and .in constructing the parts in such a manner that the cableby which the 1 string of tools is carriedcan be lengthened orletout as the drill dee ens the bore.

*A still further object is to provide means by which the parts are rendered inoperative to raise and lower-the drill even during the rotation of the shaft from which power is..

derived.

With the above and other obJects 1n view, which will be in part described and in part and claims, my invention consists in certain lolly-act forth.

'. in Fig. 1;

Fig. 3 is a detailed view showing the ratchet hub;

Fig. 4 is a view in end elevation of the hub; I v

Fig. 5 is a view in perspective showing the tri lever with the trip pawl fitted in place t lereon; and,

Fig. 6 is aview in-perspective showing the trip lever lock.

The power shaft 1 is mounted on the bear ing standards 2 and 3, and this shaft may be connected to have the revoluble movement directly transmitted thereto or might-have a geared or belted connection. A trip cylinder 4 is loosely mounted on the shaft 1,'and'a ratchet hub 5' is secured on the shaft by means of a key 6, or in any other way, to turn with the shaft and with the ratchet portion thereof within the trip cylinder 4.

Bearing standards 7 and 8 are carried on the outer wall of the trip cylinder 4 and are disposed to extend substantially radially, the trip lever 9 being mounted between these standards and pivoted in place by the bolt or (pin 10. Atnlp pawlll is mounted on one en of the trip ever 9 and has a sliding fit through an opening 12 provided through the wall. of the trip cylinder, a compression sipring 13 being mounted between the cyliner and the outer edge of the lever 9 to nor with the teeth of. theratchet hub 5. he

power shaft 1 has revoluble movement in a counter-clockwise ditection. as the parts are shown in Fig. 1, andthus as the trip pawl, 11 engages with the teeth of the ratchet hub 5,

the trip cylinder 4 will be locked to. turn with the power shaft 1.

The trip cylinder has a cable lever 14 ex-.

tending radially therefrom, and a cable guard 15, and apulley 16 are carriedby and mounted in place thereon to receive the cable 17. The line or cable 17 is run over or around thepulley 16 and at the remainii end has the string of tools suspended. t will of course be understood that the cable will be rove through or passed over a pulley on a derrick or other suitable structure, and

j as the power shaft 1, turns, the leverl'i will be swlimg to raise the tools through tighten ing or drawingin the cable, however some means must be provided to release the cylinder 4 from its setting to turn with the shaft, due to the fact that the shaft 1 is constantly rotating. \Vith this purpose in view, 1 provide a lever 18, which is held by a pin 19 or other suitable means to be capable of swing ing movement, and which has a lock 20 thereon to engage with the teeth of the segmental rack 21 so that as the adjusting lever 18 is swung to various positions it will be retained in the set position until again manually adjusted. A chain 22 is connected, by .means of a clevis 23, or in some other suitable way, with the lever 18st a point spaced from the mounting on the bolt 19, and at its remaining end the chain has connection with the outer end of the trip lever 9, through mediumof a clevis 24c, or in some other suitable way. The adjusting lever 18 is stationed at one side and somewhat spaced from the mounting of the shaft 1, substantially after the arrangement illustrated in Fig. 1, and as the trip cylinder 1 is turned through being locked with the ratchet hub 5, the cylinder will carry with the shaft until the slack of the chain 22 has been taken up, when this chain will exert a sharp jerk against the outer end of the trip lever 9 and will force the same down against the pressure of the spring 13 to such a degree that the trip pawl 11 is raised from engagement with the teeth of the hub 5, when the'cylinder is released-from its connection with the shaft 1. Upon release of the pawl 11 from the ratchet hub, the trip cylinder turns freely upon'the shaft'l, and consequently the weight of the string of tools upon the cable 17 will cause the lever 14 to be swung back sharply and the drilling tool will fall withinthe bore to brin the drill into operation, the fact that on y a small part of the weight of the drilling tool is required to pull the lever back causing the drill to strike a cutting blow with substantially its entire weight.

By swinging the adjusting lever 18 to one. side or the other from the position shown in Fig; 1, the degree of turning movement" permitted in the trip cylinder to cause chain 22 to shorten to draw against the trip lever 9 will be varied and thus the length of the-stroke of the drilling tool can be.ad justed very quickly and without then'ecessity of, disassembling .any of. the parts or sto ing the "operation of the mechanism; Togive greater latitude for adjustment of the' engthof stroke of the drilling tool, the

cable lever 14 has a plurality of openings '25 formed throughout the length thereof,

and a bolt 26 is provided*to be fitted'thro'ugh these openings togive desired adjustment to the relative spacing of the pulley lot-rem.

the center of turning of the'cylinde 7 111 the present illustration, the ulley 16 is adjusted for a short stroke of the drilling tool. but as the pulley is adjusted to be mounted farther from the turning center ,of the cyl inder, or nearer to the end of the cable lever 14, the cable will be taken in to a rcater length and consequently a longer stro 6 will be given to the drilling tool. To insure that the trip pawl 11 will not be entirely withdrawn from the opening 12 in the trip cylinder; lugs or extensions 27 and 28 are provided on the trip lever and on the trip cylinder to come together and stop movement of the trip lever in its swinging path while the trip pawl is yet within the opening 12.

mechanism inoperative without stopping revolution of the power shaft 1, and with this purpose in" mind I provide a trip lever lock which is better illustrated in Fig. 6. This lock includes a substantially bell crankshaped lever 29 which has a wedge-shaped cam portion 30 on one of the arms thereof, the member being pivoted by means of the pin 31, on the trip-cylinder 4 adjacent the" opening 12. lhe member '29 is mounted in such a position that the wedge-shaped end 30 thereof can be swung and moved beneath the inner end of the trip'lever' 9, a spring 32 however being connected with the re ma ning arm of the member 29 to normally swing thelock to substantially the position shownin Fig. 2-where the "wedge-shaped end, and in fact the entire structure, is moved to one side of the trip lever IA cable of wire33 is connected with the mem ber 29 at thewedgeshaped end thereof and is then brought around the standard Sand led out at one side so that it is presented at all times in position to bereadily accessible to the operator. When it.is desired to stop the automatic operation, thefcable or w1rei33 is pulled tdmove the wedgeshaped end 30, of the member 29 beneath the inner end of he trip lever '9, the member 29 here .sw'ung against the tension of the'spring he wed e-shaped end 30, as it is-disposed under te'trip lever 9, .will raise the sameisufiieientlyagainst the pressure of the spring13, that the tripipawl- 11 is -withdrawn from the'tripcyl'inderjto such a degree'that theinner-endclears the teeth of the ratchet hub 5, and the shaft 1 and the ratchet will be resumed.

While in the present disclosure I have illustrated the cable 17 as being fitted throughthe cable guard and then around the pulley, it will be understood that connectlon might be made directly to the.pul-. ley, although it is desirable that the free end ofthe cable be extended'off from the. pulley to be payed out as thebore made by the drill is. sunk-deeper, and thus to insure that the drilling tool will at all times have t a maximum efliciency. Asit may be desired 1 a-wl, tofree the tripflcylinder from the have provided a wel drillin can be pplicd and used in con unction with to change the length of stroke durin operation of the mechanism, to accommo ate the drilling tool for most efiicient operation upon difi'erent strata as encountered-in the bore, this can be accomplished by shifting the adjusting lever 18 to the left, as shown in Fig. 1', to lengthen the stroke and to the right to shorten the stroke;

From the'foregoin it will-beseen that I tri which derricks and tools now in use, and which has the operating parts formed in such a way i that great latitude of adjustment to adapt the machine for the particular circumstances of use is had, andthat the mechanism can be rendered inoperative at the will of the op-' erator, while it will, when in use, accom-- plishsubstantially an automatic operation.

While in theforegoin I have shown and described only specific orms and construe tion of the .parts, it will be understood that a'number of changes and variations might be made in the form of the arrangement of *the'several members and in the manner offitting and connecting the same for-use, and

hence I do not -wish to be limited to the. e xactstructure as herein set forth, but only such points as may be set forth and pointedout in the claims.

lclaim': 1. A well drilling trip pawl by which the cylinderis locked by which a cable is held in conjunction therewith, and means to release the-trip ocked connection with the power-shaft. H

2. A v'velldrilling tri t including in com,- bination withapowers aft, a tri cylinder loosely mounted on the shaft) provided trip including in combination with a powershaft, a trip cylinder having a cable lever carried as a part therej of'loosely mounted on said 'power shaft, a

with a radially extending cable lever, a ratchet hub mounted in the trip cylinder and fixed to turn with the power shaft, means adjustably carried by the cable lever to have a" cable held therearound, a trip pawl carried by the trip, cylinderto engage with the teeth of the ratchet hub to lock the: trip cylinder to be turned -with the shaft, and means to release the trip pawl.

3. A well drilling .tri including in combination with a power s aft, a tri cylinder loosely mounted on the shaft and provided with a" radially extendin cable lever,--a ratchet hub mounted in t e trip cylinder and fixed toturn with the power shaft,

' means adjustably carried by the cable lever to have a cable held therearound, a trip pawl carried by thetrip cylinder to engage with the teeth of. the ratchet hubto lock the trip cylinder to; be turned with the shaft, means to release the trip pawl, and

means to render the trip pawl inoperative.

4. A well drilling trip including in combination with a power shaft, a trip cylinder loosely mounted on the shaft, and provided with a radially extending cable "lever, a ratchet hub mounted in the trip cylinder and fixed to turn with the power shaft, means adjustably carried by the cable lever to have a cable held therearound, a trip pawl carried by the trip cylinder to engage ock with the teeth of the ratchet hub to the tripcylinder to be, turned with the shaft, means to release the trip pawl, and means to adjust the pawl releasing means to vary the degree of turning movement carried by the trip lever and extending into the trip cylinder, means to movean normally hold the trip lever in a fixed position so th'atthe'trip pawl is engaged with they teeth of the ratchet hub to lock the trip cylinder to turn with the shaft, and means to swing the trip lever to have movement so that the trip pawl is disengaged. from the holding, position when the desired turning movement of the trip cylinder has been accomplished.

6, A well drilling tri including in combination with a revolu 1y mounted power shaft, a' trip cylinder loosely mounted on the power shaft, a ratchet hub fixedly mounted on the shaft within the trip cylin der, a trip pawl extending through the cylinderymeans to normally urge the trip pawl to engage with the teeth of the ratchet ub, means by which a 'cable. carrying a drilling tool is connected with the trip cylinder, and means to render the trip pawl inoperatlve.

, 7. A well drilling trip including in,co11'1- a bination with a dpower shaft, a trip cylinder loosely mounte on the power shaft and cable holding means adjustnbl mounted on said cable lever, a ratchet hub. edly mount 19 ed on the power shaftwithin the trip cyllnder, a trip lever swingingly mounted on said trip cylinder, a trip pawl carried by one end of said trip lever and extended into the trip cylinder to'engage with the teeth 15 of the ratchet huh, means to 'normally urge the trip lever to a positionthat the trip pawl is operative, an adjusting-lever-mounted ad jacent the mounting of the power shaft and v provided with means by which the same is 20 locked in adjusted positions, and means connected between the free end ofthe trip lever and said adjusting lever.

l :15; t including incomaft, a trip cylinder power:v shaft and ed on the power shaft withinthe trip c lin-,

der, a trip lever swingin'gly moun'te on 30 =said tri vcylinder, a trip pawl carried by having a cable leverextending therefrom,

one en of said trip lever and extended into the trip cylinder to engage with the teeth of therat'chet hub, means to normally I urge the trip lever to a; position that the 55 trip pawl is operative,- an adjusting lever .mounted adj scent the mounting of the power shaft and provide'dwith means by which" the same"'is locked in adjusted positions means-connected between thefree end of 40 the trip lever and said adjusting lever, and means to be shifted to a'positionto" lock the trip lever in such a pos 1tion that the trip pawl is renderedinoperative In testimony whereof I aflix my signature as in 'presenceiof two witnesses. .7

CLEVELAND W. WOO LAND; Witnesses:

Clams.- Tense, J r., Enwsnn 

